Tone-arm for talking-machines.



J. F. SMITH.

TONE ARM FOR TALKlNG MACHINES. APPLICATION nus!) AUG-'24. x917.

Patented Apr. 29, 1919.

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JAMES F. SMITH, ca ST. LOUIS, inrssoun AssIsNon or oirE-rmnnro ANTHONY r.

. ITTNEB Ann clan-THIRD 'ro ARTHUR H. BRADLEY, BOTH or minus, inrssounr.

TONE-ARM FOB TALKING-MACHINES.

v Specification of Letters Patent.

Patenteill'Apr. 29, 1919.

191.7. Serial No. 187,921.

To all whom it may concern Be it known that I, JAMES F. SMITH, a citizen of the United States,and a resident of the city of St. Louis and State of Missouri, have invented a new and useful I-m provement in Tone-Arms for Talking-Machines, of which the following is a specification.

Thisinvention relates to .tone arms for talking'machines and particularly to tone arms used in connection with sound boxes of the type shown in my pending application Serial No. 105,141, filed June 22, 1916. The present application is a division of said application Serial No. 105,141.

The objects of the invention are to provide an inexpensive tone arm for talking machines which is neat in appearance, and of simple construction. Another object 'isto provide a flexible mount for the tone .arm,

whereby it is free to move laterally and vertically within suitable limits.

The intention consists in the combination and arrangements of parts hereinafter described and claimed.

In the accompanying drawings, which formpart of thisspecification, like numerals refer to like parts wherever they occur.

Figure 1 is 'a plan view of a tone arm and sound box embodying my invention;

Fig. 2 is aside elevation of the tone-arm and sound box shown in Fig. 1;

Fig. 3 is a vertical cross-section of the tone arm taken on the line 3+3 in Fig. 2;

Fig. 4 is a vertical cross-section of the flexible joint, for the tone arm taken .at right angles to Fig. 3; and

Fig. 5 is a horizontal section through the box is connected to the tone arm by means of an elbow 8, one branch of "which is se cured to the end of'the tone arm, and in'the other branch of which there is inserted the hollow stem 9 of the sound box. A stop 10 on the stem 9 of the sound box engages the stop 11 on the elbow 8 to position the sound box and needle at a suitable inclination to the record.

The tone arm 6 is arranged for easy'latoral and vertical movement at its free end upon which the sound box 7 is mounted.v

The support for the tone arm is a ring 12,

which is pivoted to the top-of the fixed-walls of the vertical sound passage 13 of the ma chine by pivot screw ld so'as to permit of vertical movement of the free end of the tone arm. The ring 12 has an internally threaded screw flange 15' within which is a screw ring 16. A. ring 17, which is fixed upon the end of the tone arm, is arranged for rotation between the screw ring 16 and flanged ring'12, and thereby the tone arm is free to swing laterally. Ball races are formed in the opposing faces of the flanged hanging portion of the tone arm.

The foregoing arrangement is considered only as an example and as the one most gen.- erally adapted to the tone arm as shown.

' Therefore, I do not wish to be limited to the precise forms and arrangements shown in the drawings. V

I claim the following as my invention:

1. In a talking machine, a pivot support for the tone arm comprising a ring secured Divided and this application filed August as,"

to said tone arm,'. and oppositely disposed rings surrounding said tone arm, said last mentioned rings being disposed on each side of the ring of said tone arm and being mounted for oscillation upon a horizontal axis.

2. In a talking machine, a pivot support for the tone arm comprising a ring secured to said tone arm, and oppositely disposed rings adjustable with respect to each other and surrounding said tone arm, said last mentioned rings being disposed on each side of .the ring of said. tone arm and being mounted for oscillation upon a horizontal axis.

3. In combination with the main sound conducting device of a talking machine, a

supporting collar sleeved on said sound conducting device, and a tonearm having one end rotatably arranged within said support ing collar, said supportingcollar being pivotally secured to said sound conducting device so as to oscillate upon a,horizontal axis.

4. In combination with the main sound conducting device of a talking machine, a supporting collar surrounding one end of said sound conducting device, a tone arm having an annular flange at one end thereof rotatably arranged Within said supporting collar, and means for holding the flanged end of said tone arm in said supporting collar, said supporting collar being pivotally secured to said sound conducting device so as to oscillate upon a horizontal axis.

5. The combination with the main sound conducting device of a talking machine of a supporting collar looselysecuring one end of said sound conducting device, a tone arm having an annular flange atone end thereof loosely arranged within said supporting collar for, rotation, and a ring detachably sccured to said supporting collar for holding the flanged end of said tone arm in said supporting collar, said supporting collar being secured to said sound conducting device by means of oppositely disposed pivots so as to oscillate upon a horizontal axis.

6. The combination. with the main sound conducting device of a talking machine of a supporting collar having an inwardly projecting annular flange at its bottom, said supporting collar being loosely secured on said sound conducting device, a tone arm having a ring secured to one end thereof and loosely arranged Within said supporting collars and adapted to being supported upon the annular flange thereof, and a locking ring adjustably secured to said supporting collar above the tone arm ring, said supporting collar being secured to said sound conducting device by means of oppositely disposed pivots so as to oscillate upon a horizontal axis.

Signed at St. Louis, Missouri, this 18th day of August, 1917.

JAMES E. SMITH, 

